64194030719 has 16 divisors (see below), whose sum is σ = 79015362048. Its totient is φ = 50786173152.

The previous prime is 64194030697. The next prime is 64194030757. The reversal of 64194030719 is 91703049146.

It is a de Polignac number, because none of the positive numbers 2^k-64194030719 is a prime.

It is a super-2 number, since 2×64194030719² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64194030719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64194030919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1214174 + ... + 1265940.

It is an arithmetic number, because the mean of its divisors is an integer number (4938460128).

Almost surely, 2^64194030719 is an apocalyptic number.

64194030719 is a deficient number, since it is larger than the sum of its proper divisors (14821331329).

64194030719 is a wasteful number, since it uses less digits than its factorization.

64194030719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65414.

The product of its (nonzero) digits is 163296, while the sum is 44.

The spelling of 64194030719 in words is "sixty-four billion, one hundred ninety-four million, thirty thousand, seven hundred nineteen".